And john haeton



head.

valve h simultaneously closing the communication between the induction-tube s and the portion of the cylinder in front of the piston- This reciprocating movement is kept up until the steam is shut oit from the engine. The pitman being connected with the pistonrod in the manner described, it will be readilyk understood how the power may be applied.

The action of the valves is direct, and they consequently work with the least friction and wear.

Our invention dispenses with eXternaLports and Valve-seats upon the working-cylinder, and it does not require the cross -head and slides with which to connect the pitman and piston-rod; nor does it require any eccentric, rock-arm, and their supporting mechanism. A less degree of pressure is required to actuate our improved engine to effect a given power than is required by those of ordinary construction, because the pressure is continously equal throughout the entire stroke ofthe engine, and

v there is no consumption of steam in actuating the valves.

Having practically tested our invention, its excellence and efficiency have been established. It should be further observed that the steamchest C serves to perform the functions of the guide-rails or slides and cross-head of the engines in present use.

Having fully described our invention, what weclaim, and desire to secure by Letters Patent, is-

l. The piston-rod B, providedwitha double channel-one for the livesteam and the other for the exhaust-substantially as and for the purpose specified.

2. The cylinder A, in combination with the piston-rod and its head H,`constructed and operating substantially as and for the purpose described.

3. The tubular piston-rod B and head H, in combination with the valves e j' 7L, operating in the manner and for the purpose described.

4. The collar M, in combination with the piston B, cylinder A, and steam-chest C, substantially as and for the purpose described.

5. rlhe exhaust-chamber E, in combination with the tubular piwstolrrod B, arranged and operating in the manner and for the purpose specified. y v

In testimony whereof We have subscribed our names this 22d day of May, 1869. PETER SHELLENBACK.

. JNO. HARTON.

Witnesses: H. l. K. Prion, l. S. BERRY. 

